Chlorinating unit



ct. 10, 19.50 A. L. EISENMAN 2,524,966

CHLORINATING UNIT Filed June 19, 1947 2 Sheets-Sheet 1 1416011 L fisenman o 1950 V A, L. EISENMAN 2,524,966

CHLORINATiNG UNIT Filed June 19, 1947 2 Sheets-Sheet 2 I; a f I ,7).

I QL Albert L. fisenmqn Patented Oct. 10, 1950 UNITED STATES PATENT OFFICE CHLORINATING UNIT Albert L. Eisenman, Dallas, Tex.

Application June 19, 1947, Serial No. 755,777 3 Claims. (01-. 21 o 2s) This invention relates to new and useful improvements in chlorinating units.

The invention has particularly to do with water chlorinating units for water treating systems and the like.

One object of the invention is to provide a chlorinating unit including, a simple by-pass adapted to be connected in the water supply line and an improved aspirator arranged in the bypass and utilizing water velocity to inject the treating chemical in the water flowing through the by-pass, whereby a chlorinatingsolution may be introduced into a water supply line in anemcient and reliable manner.

A further object of the invention is to provide a chlorinating unit operated entirely by water pressure and which is easy to install and low in maintenance cost. I

Another object of the invention is to provide an improved aspirator including. a water injector, a chemical pick-up conductor and a visual gauge for observing the aspirator pressure, together with means for regulating the rate of chemical injection and check means for preventing back flow of water into the chemical source when the unit is idle. a

Still another object of t e invention is to providean improved chlorinating unit which is automatic in operation and normally carries out its chlorinating function only when'water is being drawn from the water system towhich the unit is connected. a

A construction designed to carry out the invention will be hereinafter described together with other features of the invention.

The invention wi l be more readily understood 2 a other suitable type of pump II which is horizontally disposed and driven by an electric motor 12, the details of the pump and motor being immaterial. A discharge pipe I 3,leads from the pump to a storage or accumulating tank Hi, from which a service pipe l5 extends in the usual manner.

While the invention is illustrated and described with respect to use with a pump and accumulator tank unit, it obviously may be equally well employed with any conductor of fluid under pressure or any type of water system. Thus. it may be employed in conjunction with an ordinary water supply pipe through which water flows under pressure. In the latter instance, a pressure redueing means in the supply pipe is usually necessary.

j A short riser pipe l6 leads from the outlet ll of the pump and constitutes the first part of a by-pass line, indicated generally by the letter A. The riser is connected in the bottom of a manifold I8, which carries a pressure gauge 19 indicating the pressure within the water system. A lateral pipe 20 extends from the manifold to a strainer 21. A tubular conductor or a pipe 22 extends from the strainer to one side of an as- U ceptacle 25 and has a foot valve 26 on its lower from a reading of the following specification and by reference to the accompanying drawing, wherein an example of the invention is shown.

and wherein:

Fig. 1 is an elevation of a unit constructed in accordance with the invention,

Fig. 2 is a perspective view of an aspirator constructed in accordance with the invention.

Fig. 3 is a transverse vertical sectional view of A ly in elevation and partly in section.

In the drawings, the numeral l0 designates a water supply pipe which may lead from a water well or other source of water supply. This pipe is connected to the intake of a centrifugal or any end. The tubular conductors 22, 23 and 24 are preferably flexible, being made of material such M as rubber or plastic hose.

In general, the pump ll supplies waterjfrom tacle byway of. the conductor 24, whereby the chemical is admixed or dissolved in the water and I discharged by "way. iofftheffconductor 23 into the pump ll. The pressure and velocity of the bypassed water are the sole means for supplying and injecting the chemical .onchlorinating solution into the water supply line The aspirator .3 includes a block .or cub ical" housing 21 which has a flow passage 28, extending transversely therethrough. Annular recesses 28' surround the ends of the passage and the end The by-passed water in v portions of the passage are provided with screw threads 29. An injector nozzle 30 has a reduced, externally screw-threaded nipple 3| which is screwed into the threads 29 at one end of the passage; while an ejector nozzle 32 has a reduced, externally screw-threaded nipple 33 screwed into the threads 29 at the opposite end of said pas sage. Each nozzle has an annular shoulder 34, located in the adjacent recess and bearing against a gasket 35, seated in the recess. I

The nozzles have serrated shanks 36 at their outer ends, on which the ends of the flexible conductors 22 and 23 may be engaged. The in- Jector nozzle 30 has an axial bore 31 extending inwardly to a reduced bore or duct 33 extending through the nipple 3|. The nipple 33 of the ejector nozzle 32 has a reduced bore or duct 33 extending outwardly to a counterbore 40. The passage 28 is located just above the center of the block 21 (Figs. 3 and 4), and bisects a vertical, cylindrical chamber 4|. The nipple 3| has a truncated tip 3 extending into the chamber, diametrically opposite, but spaced from, a conical sump 33' in the nipple 33, which also extends into the chamber. By this arrangement the ducts 38 and 39 are axially alined with a short gap therebetween.

At the bottom of the chamber 4|, an inclined annular seat 42 surrounds a short vertical duct 43. A check valve 44 engaging in the seat has its reduced stem 45 loosely depending into the duct. The duct opens at its lower end into a horizontal bore 45, at right angles to the passage 23. At the inner end of the bore an inclined annular seat 41 is formed and a reduced bore 48 extends from the seat. A needle valve 49, of less diameter than the bore 48, extends axially of said bore and has its needle 50 extending through the seat 41 into the reduced bore 48, for regulating flow from the bore 48 to the bore 46. The stem of the needle has a snug turning fit in a packing countersunk in the block 21 and confined by a, gland nut 52, screwed into the block in the usual manner.

A nipple 53 is screwed into a screw-threaded sump 54 in the bottom of the block 21. The upper end of the conductor 24 is fastened on the nipple and the nipple has an axial bore 55 which registers with a port 55 in the under side of the bore 48. The lower end of the conductor 24 is suitably fastened on the foot valve 25, which is best shown in Fig. 6.

The foot valve has a central well 51, from the bottom of which ducts 58 extend radially to the outer surface of the valve body. An internally screw-threaded counterbore 59 is provided at the upper end of the well, with an inclined annular seat 60 therebetween. A check valve 5| en-- gages on said seat. A nipple 52 is screwed into the counterbore and is secured in the lower end of the conductor 24. It will be seen that when the unitis idle, the upper check valve 44 at the bottom of the chamber 4| will be closed, thus preventing liquids from flowing into the duct 43 and thence to the conductor 24; while the check valve 5| in the foot valve will close and trap liquids between the check valves.

Although a variety of chemicals or chemical solutions may be added to a water stream by the utilization of this invention, it is concerned primarily with the chlorination of water. Due to the corrosive nature of chlorinating agents, it is desirable that the aspirator and foot valve, along with the other portions of the system which come in contact with relatively strong treating 4 chemicals such as chlorine, be formed of a material resistant to such corrosion. Hard rubber and various synthetic resins have been found quite suitable for this purpose although other materials, resistant to the particular chemicals being handled, may be used to advantage.

In addition, various types of conductors and means for connecting said conductors to the various elements of the invention may be employed. The hose and nipple structure described may obviously be replaced with other types of connections.

Due to the turbulence within the chamber 4| when the unit is started in operation, water will fill the chamber 4|, after unseating the valve 44. This water will displace the air in and will rise into the restricted axial well 53, extending vertically in a cylindrical transparent gauge 84. This gauge is preferably made of a clear hard plastic and has a reduced, screw-threaded stem 55 at its lower end screwed into the upper end of the chamber. A packin gasket 66 is partially countersunk in the top of the block 21 and is enizaged by the gauge to provide an airtight connection.

Substantially all of the air trapped in the well 53 will be removed through the turbulence and aspirating action set up in the chamber 4|, so that water will rise nearly to the top of the well 53 under the pressure existing in the water system. However, as soon as the in ection action is started by starting of the pump and the consequent suction created, the water column in the well will be lowered because of the reduced pressure in the chamber 4|. In order to indicate the proper or recommended degree of suction exerted within the chamber 4|, an external annular groove 51 is formed in the surface of the gauge to indicate the proper height of the water column therein. As an illustration. if it is desired to operate the unit at the equivalent of 15 inches of mercury, absolute pressure, the groove is located at the level the water column in the well 83 will assume under such conditions. Since the gauge is transparent, the height of the water column may be observed therethrough.

The use of this simple pressure gauge eliminates the expense of a complex gauge of the usual variety, and, in addition, provides a rugged gauge not damaged by relatively large pressure changes.

In order that test-tube observations as to the chemical content of the treated water may be readily made, I provide vertical bores 58, 89 and 10 in the front side of the block 21. An arcuate recess 1| is formed in the face 12 of the block which exposes the front portions of the bores. In the central bore a test tube 13 may be inserted, while tubes 14 and 15 may be inserted in the bores 53 and 10, respectively, on each side thereof. Specimen solutions are placed in the tubes 14 and 15 and may be sealed therein, such solutions representing samples of water with a minimum and a maximum chemical content. As an illustration, the solution in tube 14 may contain the minimum recommended percentage of chlorine with a suitable colorimetric indicator indicator or reagent, inserted in the bore 53, l

whereby a comparison with the specimen solutions in the tubes 14 and 15 may be made.

The operation of the unit is very simple. When v the pump II is placed in operation, themajor portion of the water is discharged through the pipe l3 into the tank l4. A portion oi the discharged water is by-passed to the conductor 22 by way of the connections l6, l8 and 20 and cleaned through the strainer 2 I. This by-passed water is usually under a pressure of 40 to 50 pounds per square inch, but the pressure may vary or be adjusted.

The water enters the bore 31 of the injector nozzle 30 andflows through the reduced duct 38, whereby ahigh velocity jet is produced and directed across the chamber 4| into the sump 33 and thence into the reduced duct 39. The jetting action of the water across the chamber creates a suction which lifts the check valve 44 and draws the liquid chemicals or chlorinating liquid through the passages 43, 46, 43, 56, and 56 from the conductor 24. The suction also unseats the check valve GI and draws in the chlorinating liquid through the ducts to the well 51. The chlorinating liquid drawn into the chamber 4| is picked up by the water jet and carried into the duct 39 of the ejector nozzle 32, whereby a chlorinating solution is formed. This solution is conducted by way of the bore 40 and conductor 23 to the intake of the pump II.

It will be noted that the device is automatic in its operation. The flow through the aspirator unit occurs only when water is flowing through the conductor to which the invention is applied. Thus, when no flow exists, this chlorinating unit is idle. But, as soon as a flow of water commences, the chlorinating action is resumed so that the device operates only when water is being drawn from a water system.

The foregoing description of the invention is explanatory thereof and various changes in the size, shape and materials, as well as in the details of the illustrated construction may be made, within the scope of the appended claims,

without departing from the spirit of the invenopening connected to said by-pass conductor, a

source of treating liquid supply, a llquid conductor leading from said liquid supply to the ,a fluid treating unit including a by-pass conductor connected at one end to said. first conductor on the high pressure side of said pressure differential means for by-passing a portion of the fluid therefrom, an injector having inlet, outlet and suction openings with its inlet opening connected to the other end of said by-pass conductor, a source of treating liquid supply, a liquid conductor leading from said liquid supply to the suction opening of'said injector, and a second by-pass conductor leading from the outlet end of said injector to said first conductor on the low pressure side of said pressure differential means for conveying a treated solution from the injector to said first conductor.

3. A fluid treating unit for a fluid supply line including, a treating liquid receptacle, an injector having a suction inlet, a liquid conductor leading from said receptacle to said suction inlet, said supply line having means to produce a pressure differential therein, an injector nozzle in said injector, a fluid conductor leading from said supply line on the high pressure side of said pressure differential means to said injector nozzle, an ejector nozzle in the injector and aligned with the injector nozzle, and a fluid conductor leading from the ejector nozzle to the supply line on the low pressure side of said pressure differential means. 7

ALBERT L. EISENMAN.

REFERENCES CITED The following refrnces are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,937,330 Brice Nov. 28, 1933 2,065,583 Heitzmann Dec. 29, 1936 2,207,761 Sayles July 16, 1940 2,260,936 Everson Oct. 28, 1941 2,358,591 Pagatz Sept. 19, 1944 FOREIGN PATENTS Number Country Date 203,961 Switzerland May 1, 1940 

